Laser weld inspection

Real-time monitoring of the laser-based applications is becoming a main issue for quality analysis in the steel manufacturing industry. We have studied a solution that permits to achieve an automated real-time quality inspection in laser welding applications. A composite system composed of computational intelligence and traditional techniques has been considered for its positive impact on the reduced computational once compared with more traditional approaches.

The research have been performed in collaboration with Philips and FIAT.

Laser welding controller

Schema of the researched system


This work was supported by the European project SLAPS.
  • C. Alippi, G. D'Angelo, G. Invernizzi, G. Pasquettaz, V. Piuri, "Procedimento per il controllo della qualita' di processi di saldatura laser", European Patent no. 05425662.3, September, 2005
  • C. Alippi, G. D'Angelo, M. Matteucci, G. Pasquettaz, V. Piuri and F. Scotti, "Composite techniques for quality analysis in automotive laser welding", in Proc. of the 2003 IEEE Int. Comference on Computational Intelligence for Measurement Systems and Applications (CIMSA 2003), Lugano, Switzerland, pp. 72-77, July 27-29, 2003. ISBN: 0-7803-7783-4. [DOI: 10.1109/CIMSA.2003.1227205][PDF]
  • C. Alippi, G. D'Angelo, M. Matteucci, G. Pasquettaz, V. Piuri, F. Scotti, "A system and method for monitoring laser welds and giving an indication of the quality of welding", USA Patent no. EP1371443 (European Patent no. TO2002A000508), April, 2003
  • V. Piuri, "Composite technologies for intelligent industrial laser processing", in Proc. of the 2002 ISA/IEEE Sensors for Industry Conf. (SICon 2002), Houston, TX, USA, pp. 270-282, November 19-21, 2002. ISBN: 1-55617-834-4. [DOI: 10.1109/SFICON.2002.1159839][PDF]
  • C. Alippi, G. D'Aangelo, M. Matteucci and G. Pasquettaz, V. Piuri, F. Scotti, "Sistema di monitoraggio per la qualita' di saldature laser in tempo reale (Real-time laser welding monitoring system)", Italian Patent No. TO2002A000508, 2002
  • C. Alippi, P. Braione, V. Piuri, F. Scotti, "A methodological approach to multisensor classification for innovative laser material processing units", in Proc. of the 2001 IEEE Instrumentation and Measurement Technology Conf. (IMTC 2001), Budapest, Hungary, pp. 1762-1767, May 21-23, 2001. ISBN: 0-7803-6646-8. [DOI: 10.1109/IMTC.2001.929503][PDF]